Images: Beloved teacher called 'brilliant ray of light'

Mourners walk towards one of the high school fields during a candle light vigil held outside the Danvers High School for Danvers High School math teacher Colleen Ritzer who was murdered by one of her students, 14 year old Philip D. Chism.

A day after Trevor Noah was declared the new host of "The Daily Show," complete with the blessing of the exiting Jon Stewart, graphic tweets targeting women, Jews and victims of the Ebola virus are causing a social media backlash.